CentOS 7 install PostgreSQL dependency error

When running yum install postgresql-server.x86_64, I encounter the following error:

--> Processing Dependency: libreadline.so.5()(64bit) for package: postgresql-server-8.1.23-10.el5_10.x86_64
--> Finished Dependency Resolution
Error: Package: postgresql-8.1.23-10.el5_10.x86_64 (el5_latest)
           Requires: libreadline.so.5()(64bit)
           Available: readline-5.1-3.el5.x86_64 (el5_latest)
               libreadline.so.5()(64bit)
           Installed: readline-6.2-9.el7.x86_64 (@anaconda)
              ~libreadline.so.6()(64bit)
Error: Package: postgresql-8.1.23-10.el5_10.x86_64 (el5_latest)
           Requires: libtermcap.so.2()(64bit)
           Available: libtermcap-2.0.8-46.1.x86_64 (el5_latest)
               libtermcap.so.2()(64bit)
Error: Package: postgresql-server-8.1.23-10.el5_10.x86_64 (el5_latest)
           Requires: libreadline.so.5()(64bit)
           Available: readline-5.1-3.el5.x86_64 (el5_latest)
               libreadline.so.5()(64bit)
           Installed: readline-6.2-9.el7.x86_64 (@anaconda)
              ~libreadline.so.6()(64bit)
Error: Package: postgresql-server-8.1.23-10.el5_10.x86_64 (el5_latest)
           Requires: libtermcap.so.2()(64bit)
           Available: libtermcap-2.0.8-46.1.x86_64 (el5_latest)
               libtermcap.so.2()(64bit)

My first guess was that I didn't have readline installed, but it turns out that this is not the issue:

~ % yum list installed|grep readline
readline.x86_64                 6.2-9.el7                              @anaconda
readline-devel.x86_64           6.2-9.el7                              @base

I am assuming there is still a missing dependency.

The error message itself is a bit cryptic - what can I do to resolve this and resume installation?

Solution 1:

The packages that you are trying to install actually depend on an older version of CentOS.

Notice in your error message, you reference the el5_latest repository, which is for CentOS 5 or RHEL 5, but you have CentOS 7 installed. The major versions are not compatible.

The oldest version of PostgreSQL available for CentOS 7 is version 9.3. You can install it with these commands:

rpm -iUvh http://yum.postgresql.org/9.3/redhat/rhel-7-x86_64/pgdg-centos93-9.3-1.noarch.rpm
yum -y install postgresql93-server

The latest version of PostgreSQL available for CentOS 7 (at the time of writing) is version 9.4. You can install it with these commands:

rpm -Uvh http://yum.postgresql.org/9.4/redhat/rhel-7-x86_64/pgdg-centos94-9.4-1.noarch.rpm
yum install postgresql94-server